19066319887447 has 16 divisors (see below), whose sum is σ = 22738452111360. Its totient is φ = 15631341815232.

The previous prime is 19066319887423. The next prime is 19066319887463. The reversal of 19066319887447 is 74478891366091.

It is not a de Polignac number, because 19066319887447 - 2¹¹ = 19066319885399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19066319887447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19066319881447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1228618 + ... + 6296200.

It is an arithmetic number, because the mean of its divisors is an integer number (1421153256960).

Almost surely, 2^{19066319887447} is an apocalyptic number.

19066319887447 is a deficient number, since it is larger than the sum of its proper divisors (3672132223913).

19066319887447 is a wasteful number, since it uses less digits than its factorization.

19066319887447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5090982.

The product of its (nonzero) digits is 438939648, while the sum is 73.

The spelling of 19066319887447 in words is "nineteen trillion, sixty-six billion, three hundred nineteen million, eight hundred eighty-seven thousand, four hundred forty-seven".